At daybreak all were summoned for action. Cortes arranged his fleet in a half circle and in this order, which was necessary on account of the shores, he began sailing up the stream. But before opening the attack, he sent Aguilar to inform the natives that it rested with them to say whether he should come as an enemy or a friend. Aguilar performed his duty, but instead of listening quietly to him the Indians gave the signal for attack and rowed out in their canoes to meet the fleet. They came together and the Indians began the assault with a dreadful storm of arrows and stones which caused great discomfort to the Spaniards, who were still remaining passive. At this Cortes gave the signal for defence. A single shot from the great cannon was decisive. The Indians, astonished at the unexpected thunder which roared about them, and terrified at the sight of its destructive consequences, jumped from their canoes into the water and endeavored with all their might to escape by swimming. The Spanish vessels drew up to the banks, and Cortes landed with his whole force undisturbed. The battle, however, was far from being ended. The Indians, who had left their canoes, fled into the brush, where a still greater number of their warriors were collected. They rushed forward while Cortes was engaged in placing his men in battle order, and attacked him with arrows, spears, and stones, uttering appalling battle cries. Cortes, however, was not disturbed but continued the arrangement of his ranks until the whole corps was in close battle order. Then they charged furiously against the Indians, advanced with wonderful coolness through deep morasses and dense thickets upon the countless swarms of the enemy, and death and terror beat a way for them. The sight of an army with European weapons was as new as it was fearful to the Indians. They could not face it and incontinently took to flight.